docs: def set_pattern_step_setpoint(self, patternnumber, stepnumber, setpointvalue):
          """Set the setpoint value for a step.
  
          Args:
              * patternnumber (integer): 0-7
              * stepnumber (integer): 0-7
              * setpointvalue (float): Setpoint value
          """
          _checkPatternNumber(patternnumber)
          _checkStepNumber(stepnumber)
          _checkSetpointValue(setpointvalue, self.setpoint_max)
          
          address = _calculateRegisterAddress('setpoint', patternnumber, stepnumber)
          self.write_register(address, setpointvalue, 1)